D L Methionine F G 99% is an absolute form of the amino acid Methionine, which is sulfur containing essential amino acid in virtue of which it plays an important role in many biological processes, for example, synthesis, detoxification, and cell functions. Methionine is an essential amino acid; that is, it is not produced in the body, and it has to be obtained from food sources, such as eggs, meat, fish, and dairy products. This is widely used in dietary supplements, on grounds of supposed health benefits, such as support for detoxifying the liver, promoting healthy hair growth, and as antioxidant, among others. D L Methionine F G 99% is the purest form of the amino acid methionine and can be generally applied in dietary supplementations, cosmetics, and industrial applications.